A survey of the many explanations given for the tradition of eating milk products.

Although everyone agrees that the food of choice for Shavuot is cheese (most typically blintzes, crepe-like pancakes filled with farmer cheese, or a Sephardic [Mediterranean Jewish] equivalent such as burekas, cheese-filled dough pockets), there are differences of opinion (some quite charming) as to why it is a custom.

Some derive the practice directly from scripture, saying we eat dairy to symbolize the "land flowing with milk and honey" (Exodus 3:8) promised to the Israelites, or that "milk and honey are under your tongue" (Song of Songs 4:11). These passages, along with "The precepts of the Lord are… sweeter than honey" (Psalm 19:9-11) also indicate we should eat honey, which is customary in some communities.
A sage discovered that the initials of the four Hebrew words in Numbers 28:26, which describe the sacrificial meal offering on Shavuot, spell mei halav (from milk), suggesting that dairy food is the acceptable dinner for the festival. At Sinai, the Israelites were considered to be as innocent as newborns, whose food is milk.

Those of kabbalistic [mystical] bent equate the numerical value of the word halav, 40 ('het'=8, 'lamed'=30, 'vet'=2), with the number of days Moses spent on Mount Sinai receiving the Ten Commandments and other teachings (Exodus 24:18). Others look to the mountain itself, which is termed in Psalms mount of gavnunim (68:15), meaning many peaks. They connect that description with the Hebrew word g'vinah, meaning cheese.

Scholars who trace all Jewish customs and rituals to practices common among various ethnic groups claim that spring harvest festivals characteristically featured dairy dishes, perhaps because cheese was produced during that season.

There is also support for the custom based on the spiritual development among the Israelites in the wake of Sinai. After the Torah was given, they were obligated to follow its laws, including those governing dietary practice. As they returned to the camp from Revelation, they could not eat the previously prepared meat, which had not been done according to the laws of kashrut [dietary restrictions]. Since butchering and cooking fresh meat would take too long for the tired, hungry Israelites, they took the dairy food that was readily available. Symbolizing modesty, the dairy was also seen as appropriate for the occasion of receiving the Torah, which should always be approached with humility.